213738087 has 32 divisors (see below), whose sum is σ = 314091520. Its totient is φ = 128770560.

The previous prime is 213738037. The next prime is 213738089. The reversal of 213738087 is 780837312.

It is not a de Polignac number, because 213738087 - 2⁶ = 213738023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213738089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128163 + ... + 129819.

It is an arithmetic number, because the mean of its divisors is an integer number (9815360).

Almost surely, 2^213738087 is an apocalyptic number.

213738087 is a deficient number, since it is larger than the sum of its proper divisors (100353433).

213738087 is a wasteful number, since it uses less digits than its factorization.

213738087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 213738087 is about 14619.7840955330. The cubic root of 213738087 is about 597.8982826810.

The spelling of 213738087 in words is "two hundred thirteen million, seven hundred thirty-eight thousand, eighty-seven".